含能材料2026，Vol.34Issue(5)：528-538,11.DOI:10.11943/CJEM2026001
孔内分层柱形装药下岩石试件爆破破坏特征
Blasting Failure Characteristics of Rock Specimen under Hole-inner Layered Column Charge
摘要
Abstract
To improve the rock failure effects in open-pit deep hole blasting,a hole-inner layered column charge was designed.Firstly,small charge quantity blasting experiments under different charge forms were conducted to obtain the blasting failure pro-cess and final failure morphology of rock specimens.Then,the DEM-PBM(Discrete Element Method-Particle Blast Method)coupled simulation technique was used to numerically simulate the blasting process of various charges,further visually revealing the blasting failure characteristics of rock specimens.Finally,field tests were conducted to investigate the practical application ef-fects of this charge form.The results showed that under the blasting action of hole-inner continuous column charge,only one blasting crack occurs in the 1/4 section at the top of the rock specimen,dividing it into two parts.The horizontal moving velocity of the rock fragment is 2.0 m·s-1,and a large rock fragment with a diameter of 9.0 cm is produced after blasting.Under the the blasting action of hole-inner layered column charge,multiple blasting cracks occur in the 1/4 section at the top of the rock speci-men,dividing it into several fragments.The horizontal moving velocity of the rock fragment increase into 7.0 m·s-1,and no large fragments with a diameter of more than 5 cm is formed.Numerical simulations visualized the blasting process of rock speci-mens,and verified that the hole-inner layered column charge could eliminate large fragments with a size exceeding 5.0 cm.In practical open-pit deep hole bench blasting,the use of hole-inner layered column charge could significantly enhance the failure degree of rock mass at the top of bench,reducing the large rock fragment rate from 48.1%to 5.6%,which proved its engineer-ing practicality in improving rock failure effects of deep hole blasting.关键词
孔内分层柱形装药/岩石试件/破坏特征/数值模拟/现场试验/碎块块径Key words
hole-inner layered column charge/rock specimens/failure characteristics/numerical simulation/field tests/fragment diameter分类
军事科技引用本文复制引用
程兵,叶福,汪泉,程扬帆,宗琦,徐颖,王梦想,李俊豪..孔内分层柱形装药下岩石试件爆破破坏特征[J].含能材料,2026,34(5):528-538,11.基金项目
国家自然科学基金(52274071,52504075,52574133) （52274071,52504075,52574133）
安徽省自然科学基金(2408085QA029) （2408085QA029）
矿山地下工程教育部工程研究中心开放基金(JYBGCZX2023105)National Natural Science Foundation of China(52274071,52504075,52574133) （JYBGCZX2023105）
Anhui Provincial Natural Science Foundation(2408085QA029) （2408085QA029）
Open Research Grant of Engineering Research Center of Underground Mine Construc-tion of Ministry of Education(JYBGCCZX2023105) （JYBGCCZX2023105）
